A novelization of the game. Jacob Lee has lived a shady life, but he finally has a way out. Running cargo between the moons of Jupiter is going to get him a massive payday. But that all goes out the airlock when he crashes on Callisto, the dead moon, and finds himself in a fight for his life as nightmarish creatures overrun the prison built there...

Daniels has been sentenced to Black Iron Prison. After a few miserable months, he suddenly finds himself in a unique position: as a professional diver, he is tasked with diving into the mysterious Stygian Sea the prison is built near and recovering...something. Something he can't know the truth about. Something he can't talk about. Ever.